SilverLight 3.0 WCF連接數據庫

1.首先在Silverlight網站項目中添加一個Linq To Sql類,命名爲student：

 

2.在silverLight網站項目中添加一個WCF服務,就會產生一個IStudentService文件和StudentService文件。

 

IService文件中的代碼如下：

using System; using System.Collections.Generic; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.Text; namespace Sample.Web { // 注意: 使用“重構”菜單上的“重命名”命令，可以同時更改代碼和配置文件中的接口名“IStudentService”。 [ServiceContract] public interface IStudentService { [OperationContract] List<student> getStudents(); [OperationContract] List<student> getStudentByStuId(string stuId); [OperationContract] int Update(student stu1); [OperationContract] int Add(student stu); [OperationContract] void DeleteStudent(string stuId); } }

 

3.StudentService文件中的代碼如下：

using System; using System.Collections.Generic; using System.Linq; using System.Runtime.Serialization; using System.ServiceModel; using System.Text; using System.ServiceModel.Activation; namespace Sample.Web { // 注意: 使用“重構”菜單上的“重命名”命令，可以同時更改代碼、svc 和配置文件中的類名“StudentService”。 //這是自己加的。 不加則會報錯，對應的命名空間爲 //using System.ServiceModel.Activation; [AspNetCompatibilityRequirements(RequirementsMode=AspNetCompatibilityRequirementsMode.Required)] public class StudentService : IStudentService { public List<student> getStudents() { StudentDataContext stu = new StudentDataContext(); var query = from p in stu.student select p; return query.ToList<student>(); } public List<student> getStudentByStuId(string stuId) { StudentDataContext dc = new StudentDataContext(); var query = from p in dc.student where p.stuId == stuId select p; return query.ToList<student>(); } public int Update(student stu1) { StudentDataContext service = new StudentDataContext(); student stu = (from s in service.student where s.stuId == stu1.stuId select s).First(); stu.stuId = stu1.stuId; stu.stuName = stu1.stuName; stu.tel = stu1.tel; service.SubmitChanges(); return 1; } public int Add(student stu) { StudentDataContext dc = new StudentDataContext(); dc.student.InsertOnSubmit(stu); dc.SubmitChanges(); return 1; } public void DeleteStudent(string stuId) { StudentDataContext dc = new StudentDataContext(); var stu = from p in dc.student where p.stuId == stuId select p; dc.student.DeleteOnSubmit(stu.First()); dc.SubmitChanges(); } } }

 

4.在SilverLight項目中添加一個服務引用，命名爲ServiceRefences2；

 

在項目中添加一個BindStudent的XamlUserControl，命名爲BindStudent：

 

BindStudent的Xaml代碼爲：

 

<UserControl xmlns:my="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" x:Class="Sample.BindStudent" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="400"> <Grid x:Name="LayoutRoot" Background="White"> <Grid.Resources> <Style x:Key="myTextBox" TargetType="TextBox"> <Setter Property="Width" Value="300"/> <Setter Property="Height" Value="30"/> <Setter Property="Margin" Value="5 -15 0 0"/> </Style> <Style x:Key="myTextBlock" TargetType="TextBlock"> <Setter Property="Margin" Value="50 5 0 0"/> </Style> </Grid.Resources> <my:DataGrid x:Name="dg_student" LoadingRow="dg_student_LoadingRow"> <my:DataGrid.Columns> <my:DataGridTemplateColumn Header="操作" Width="120"> <my:DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <Button x:Name="btnUpdate" Width="50" Height="30" Click="btnUpdate_Click" Content="修改" Margin="5"/> <Button x:Name="btnDelete" Width="50" Height="30" Click="btnDelete_Click" Content="刪除" Margin="5"/> </StackPanel> </DataTemplate> </my:DataGridTemplateColumn.CellTemplate> </my:DataGridTemplateColumn> </my:DataGrid.Columns> </my:DataGrid> <Border x:Name="bdDetail" Width="600" Height="400" BorderThickness="2" BorderBrush="Gray" CornerRadius="5" Visibility="Collapsed"> <StackPanel> <TextBlock x:Name="txtBStuId" Style="{StaticResource myTextBlock}" mce_Style="{StaticResource myTextBlock}"/> <TextBox x:Name="txtStuId" Style="{StaticResource myTextBox}" mce_Style="{StaticResource myTextBox}"/> <TextBlock x:Name="txtBStuName" Style="{StaticResource myTextBlock}" mce_Style="{StaticResource myTextBlock}"/> <TextBox x:Name="txtStuName" Style="{StaticResource myTextBox}" mce_Style="{StaticResource myTextBox}"/> <TextBlock x:Name="txtBTel" Style="{StaticResource myTextBlock}" mce_Style="{StaticResource myTextBlock}"/> <TextBox x:Name="txtTel" Style="{StaticResource myTextBox}" mce_Style="{StaticResource myTextBox}"/> <StackPanel Width="200" Margin="10" Orientation="Horizontal"> <Button x:Name="btnSave" Width="80" Height="30" Content="保存" Click="btnSave_Click"/> <Button x:Name="btnCancel" Width="80" Height="30" Content="取消" Click="btnCancel_Click"/> </StackPanel> </StackPanel> </Border> </Grid> </UserControl>

 

bindStudent的後臺代碼爲：

 

using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using Sample.ServiceReference2; namespace Sample { public enum State { Add,Update } public partial class BindStudent : UserControl { private static student data = new student(); //該Student就是在網站項目中聲明的名爲student的Linq to sql 類 private ServiceReference2.StudentServiceClient sc = new StudentServiceClient(); public State state; public BindStudent() { InitializeComponent(); //BindData(); AddEvents(); sc.getStudentsAsync(); } //public void BindData() //{ // ServiceReference2.StudentServiceClient stu = new ServiceReference2.StudentServiceClient(); // stu.getStudentsCompleted+=new EventHandler<ServiceReference2.getStudentsCompletedEventArgs>(stu_getStudentsCompleted); // stu.getStudentsAsync(); //} public void AddEvents() { sc.getStudentsCompleted+=new EventHandler<getStudentsCompletedEventArgs>(sc_getStudentsCompleted); sc.AddCompleted+=new EventHandler<AddCompletedEventArgs>(sc_AddCompleted); //sc.DeleteStudentCompleted+=new EventHandler<>(sc_DeleteStudentCompleted); sc.UpdateCompleted+=new EventHandler<UpdateCompletedEventArgs>(sc_UpdateCompleted); } void sc_getStudentsCompleted(object sender, getStudentsCompletedEventArgs e) { List<student> student = new List<student>(e.Result); dg_student.ItemsSource = student; } void sc_AddCompleted(object sender,AddCompletedEventArgs e) { sc.getStudentsAsync(); bdDetail.Visibility = Visibility.Collapsed; } //void sc_DeleteStudentCompleted(Object sende,DataGridRowDetailsEventArgs e) //{ // sc.getStudentsAsync(); //} void sc_UpdateCompleted(object sender, UpdateCompletedEventArgs e) { sc.getStudentsAsync(); bdDetail.Visibility = Visibility.Collapsed; } private void btnUpdate_Click(object sender, RoutedEventArgs e) { state = State.Update; Button myButton = sender as Button; student tempUser = myButton.Tag as student; if(tempUser!=null) { data = tempUser; txtStuId.Text = data.stuId; txtStuName.Text = data.stuName; txtTel.Text = data.tel; bdDetail.Visibility = Visibility.Visible; } } private void btnDelete_Click(object sender, RoutedEventArgs e) { MessageBox.Show("您確定要刪除嗎？"); } private void btnSave_Click(object sender, RoutedEventArgs e) { data.stuId = txtStuId.Text; data.stuName = txtStuName.Text; data.tel = txtTel.Text; if(state==State.Update) { sc.UpdateAsync(data); } } private void btnCancel_Click(object sender, RoutedEventArgs e) { bdDetail.Visibility = Visibility.Collapsed; } private void dg_student_LoadingRow(object sender, DataGridRowEventArgs e) { student stu = (student)e.Row.DataContext; Button btn_Update = dg_student.Columns[0].GetCellContent(e.Row).FindName("btnUpdate") as Button; Button btn_Delete = dg_student.Columns[0].GetCellContent(e.Row).FindName("btnDelete") as Button; btn_Update.Tag = stu; btn_Delete.Tag = stu.stuId; } } }

 

 

OK. 效果如下 ： 修改做好了， 刪除就沒做了。